623975990 has 64 divisors (see below), whose sum is σ = 1304875008. Its totient is φ = 212313600.

The previous prime is 623975987. The next prime is 623976013. The reversal of 623975990 is 99579326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356297 + ... + 358043.

It is an arithmetic number, because the mean of its divisors is an integer number (20388672).

Almost surely, 2^623975990 is an apocalyptic number.

623975990 is an abundant number, since it is smaller than the sum of its proper divisors (680899018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

623975990 is a wasteful number, since it uses less digits than its factorization.

623975990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 623975990 is about 24979.5114043490. The cubic root of 623975990 is about 854.5207760991.

The spelling of 623975990 in words is "six hundred twenty-three million, nine hundred seventy-five thousand, nine hundred ninety".